#include<stdio.h>

int main()
{
    printf("%d %d\n",(3,4));
    int score;
    scanf("%d",&score);
    if(score<0||score>100)
        puts("Are you kidding!");
    else if(score>=90){
        puts("A");
        printf("your score=%d!\n",score);
    }
    else if(score>=80)
        puts("B");
    else if(score>=70)
        puts("C");
    else if(score>=60)
        puts("D");
    else
        puts("E");

}
